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Before being simplified, the instructions for computing income tax Country R were to add 2 percent of one's annual income to the average(arithmetic mean) of 100 units of Country R's currency and 1 percent of one's annual income. Which of the folowing represents the simplified formula for computing the income tax, in Country R's currency, for a person in that country whose annual income is I ?
答案是 50+I/40
第一句话看不太明白,income tax是怎么求啊?看不懂。。
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